20
Appendix
<Disc>
CD-R CD-RW
Characteristic CD-R CD-RW
Dimensions (External diameter) φ120 mm φ120 mm
(Internal diameter) φ15 mm φ15 mm
(Thickness) 1.2 mm 1.2 mm
Recording area (User area) φ50 to 116 mm φ50 to 116 mm
Recording capacity (Time) 74 minutes 63 minutes 74 minutes
(Capacity)* 650MB 550MB 650 MB
(Linear speed) 1.2 m/s 1.4 m/s 1.2 m/s
Track pitch 1.6 ± 0.1µm 1.6 ± 0.1µm
Substrate material Polycarbonate Polycarbonate
Recording material
Reflectance (R to p) 65% or more 15 to 25%
Eccentricity 70µm or less 70µm or less
Maximum camber angle 0.4°or less 0.4°or less
Recommended recording power 6 to 7mW(at λ:785nm, NA:0.5)8 to 4mW(at λ:785nm, NA:0.5)
Playback power 1mW or less 1mW or less
Playback stability 10
6
times or more (0.7mW)
Environment for use -5 to 55°C 10 to 40°C
5 to 95%RH 10 to 80%RH
Storage life
Number of times rewritable ---- 1,000 times or less
* The above specifications are for Ricoh CD-R and CD-RW discs
* RRecommended Discs
CD-R : Ricoh, Kao, Taiyo Yuden, Mitsubishi Chemical, Mitsui Toatsu,
TDK, and Kodak discs.
CD-RW : Ricoh, Kao, Mitsubishi Chemical discs.
Organic pigment
(phthalocyanine)
Ag-In-Sb-Te phase change
recording material
/Au lamination
(Organic protective
layer attached)
10
6
times or more
(Playback power = 1mW)
10 years or more
(5 to 25°C, 5 to 60%RH
Avoiding direct sunlight)
30 years or more
5 to 25°C 5 to 60%RH
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